 | UDC 621.882.6 | GB 31.2-88
代替 GB31、23、24-76 | | 六角头螺杆带孔螺栓 细杆 B级 | | Hexagon bolts with split pin hole on shank-Reduced shank-product grade B |
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 | UDC 621.882.6 | GB 31.3-88
代替 GB31、23、24-76 | | 六角头螺杆带孔螺栓 细牙 A和B级 | | Hexagon bolts with split pin hole on shank-Fine pitch thread-product grade A and B |
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 | UDC 621.882.6 | GB 32.1-88
代替 GB32、25、26-76 | | 六角头头部带孔螺栓 A 和 B级 | | Hexagon bolts with wire holes on head-product grade A and B |
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 | UDC 621.882.6 | GB 32.2-88
代替 GB32、25、26-76 | | 六角头头部带孔螺栓 细杆 B级 | | Hexagon bolts with wire holes on head-Reduced shank-product grade B |
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